C-MARK professional speakers have passed the acoustic test by EASE professional acoustic design software. All indicators of the tested C-MARK speakers have met the design requirements. The models include: AT18, AT2402, AT3703, AT4703, FT04, and FT05.

EASE (China) Acoustic Design and Consulting Co., Ltd. is the official German AFMG authorized sales agent. Since 2010, It has provided professional speaker detection for domestic speaker manufacturers and help them enter into the EASE Database. Bao Ye Heng is among the only three Chinese manufacturers that have this honor.